<template>
    <div>
        <h1>Tree 树形控件</h1>
        <Anchor title="概述" h2></Anchor>
        <p>文件夹、组织架构、生物分类、国家地区等等，世间万物的大多数结构都是树形结构。使用树控件可以完整展现其中的层级关系，并具有展开收起选择等交互功能。</p>
        <Anchor title="代码示例" h2></Anchor>
        <Demo title="基础用法">
            <div slot="demo">
                <Tree :data="data1"></Tree>
            </div>
            <div slot="desc">
                <p>最简单的用法，展示可选中，默认展开功能。</p>
            </div>
            <i-code lang="html" slot="code">{{ code.base }}</i-code>
        </Demo>
        <Demo title="可勾选">
            <div slot="demo">
                <Tree :data="data2" show-checkbox></Tree>
            </div>
            <div slot="desc">
                <p>设置属性 <code>show-checkbox</code> 可以对节点进行勾选。</p>
            </div>
            <i-code lang="html" slot="code">{{ code.checkbox }}</i-code>
        </Demo>
        <Demo title="异步加载子节点">
            <div slot="demo">
                <Tree :data="data3" :load-data="loadData" show-checkbox></Tree>
            </div>
            <div slot="desc">
                <p>使用 <code>load-data</code> 属性可以异步加载子节点，需要给数据增加 <code>loading</code> 来标识当前是否在加载中。</p>
                <p>load-data 第一个参数为当前节点信息；执行 load-data 的第二个参数，将需要添加的数据传入。</p>
                <p>如果某节点不包含 <code>loading</code> 和 <code>children</code> 字段，则不会应用异步加载效果。</p>
            </div>
            <i-code lang="html" slot="code">{{ code.lazy }}</i-code>
        </Demo>
        <Demo title="默认展开、选中、勾选和禁用">
            <div slot="demo">
                <Tree :data="data4" show-checkbox multiple></Tree>
            </div>
            <div slot="desc">
                <p>给节点设置 <code>expand</code>、<code>selected</code>、<code>checked</code> 和 <code>disabled</code>
                    可以将节点设置为展开、选中、勾选和禁用。</p>
                <p>设置属性 <code>multiple</code> 可进行多选。</p>
            </div>
            <i-code lang="html" slot="code">{{ code.more }}</i-code>
        </Demo>
        <Demo title="自定义节点内容">
            <div slot="demo">
                <Tree :data="data5" :render="renderContent"></Tree>
            </div>
            <div slot="desc">
                <p>使用强大的 Render 函数可以自定义节点显示内容和交互，比如添加图标，按钮等。</p>
                <p>Render 函数的第二个参数，包含三个字段：</p>
                <ul>
                    <li><strong>root</strong> &lt;Array&gt;：树的根节点</li>
                    <li><strong>node</strong> &lt;Object&gt;：当前节点</li>
                    <li><strong>data</strong> &lt;Object&gt;：当前节点的数据</li>
                </ul>
                <p>通过合理地使用 root、node 和 data 可以实现各种效果，其中，iView 给每个节点都设置了一个 <code>nodeKey</code> 字段，用来标识节点的 id。</p>
                <p>Render 函数分两种，一种是给当前树的每个节点都设置同样的渲染内容，此 render 通过 Tree 组件的属性 <code>render</code> 传递；另一种是单独给某个节点设置，在该节点的
                    <code>render</code> 字段内设置；同时设置时，会优先使用当前节点的 Render 函数。</p>
                <p></p>
            </div>
            <i-code lang="html" slot="code">{{ code.render }}</i-code>
        </Demo>

        <!-- <ad></ad> -->

        <div class="api">
            <Anchor title="API" h2></Anchor>
            <Anchor title="Tree props" h3></Anchor>
            <table>
                <thead>
                <tr>
                    <th>属性</th>
                    <th>说明</th>
                    <th>类型</th>
                    <th>默认值</th>
                </tr>
                </thead>
                <tbody>
                <tr>
                    <td>data</td>
                    <td>可嵌套的节点属性的数组，生成 tree 的数据</td>
                    <td>Array</td>
                    <td>[]</td>
                </tr>
                <tr>
                    <td>multiple</td>
                    <td>是否支持多选</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>show-checkbox</td>
                    <td>是否显示多选框</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>empty-text</td>
                    <td>没有数据时的提示</td>
                    <td>String</td>
                    <td>暂无数据</td>
                </tr>
                <tr>
                    <td>load-data</td>
                    <td>异步加载数据的方法，见示例</td>
                    <td>Function</td>
                    <td>-</td>
                </tr>
                <tr>
                    <td>render</td>
                    <td>自定义渲染内容，见示例</td>
                    <td>Function</td>
                    <td>-</td>
                </tr>
                <tr>
                    <td>children-key</td>
                    <td>定义子节点键</td>
                    <td>String</td>
                    <td>children</td>
                </tr>
                </tbody>
            </table>
            <Anchor title="Tree events" h3></Anchor>
            <table>
                <thead>
                <tr>
                    <th>事件名</th>
                    <th>说明</th>
                    <th>返回值</th>
                </tr>
                </thead>
                <tbody>
                <tr>
                    <td>on-select-change</td>
                    <td>点击树节点时触发</td>
                    <td>当前已选中的节点数组</td>
                </tr>
                <tr>
                    <td>on-check-change</td>
                    <td>点击复选框时触发</td>
                    <td>当前已勾选节点的数组</td>
                </tr>
                <tr>
                    <td>on-toggle-expand</td>
                    <td>展开和收起子列表时触发</td>
                    <td>当前节点的数据</td>
                </tr>
                </tbody>
            </table>
            <Anchor title="Tree methods" h3></Anchor>
            <table>
                <thead>
                <tr>
                    <th>方法名</th>
                    <th>说明</th>
                    <th>参数</th>
                </tr>
                </thead>
                <tbody>
                <tr>
                    <td>getCheckedNodes</td>
                    <td>获取被勾选的节点</td>
                    <td>无</td>
                </tr>
                <tr>
                    <td>getSelectedNodes</td>
                    <td>获取被选中的节点</td>
                    <td>无</td>
                </tr>
                </tbody>
            </table>
            <Anchor title="children" h3></Anchor>
            <table>
                <thead>
                <tr>
                    <th>属性</th>
                    <th>说明</th>
                    <th>类型</th>
                    <th>默认值</th>
                </tr>
                </thead>
                <tbody>
                <tr>
                    <td>title</td>
                    <td>标题</td>
                    <td>String | Element String</td>
                    <td>-</td>
                </tr>
                <tr>
                    <td>expand</td>
                    <td>是否展开直子节点</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>disabled</td>
                    <td>禁掉响应</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>disableCheckbox</td>
                    <td>禁掉 checkbox</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>selected</td>
                    <td>是否选中子节点</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>checked</td>
                    <td>是否勾选(如果勾选，子节点也会全部勾选)</td>
                    <td>Boolean</td>
                    <td>false</td>
                </tr>
                <tr>
                    <td>children</td>
                    <td>子节点属性数组</td>
                    <td>Array</td>
                    <td>-</td>
                </tr>
                <tr>
                    <td>render</td>
                    <td>自定义当前节点渲染内容，见示例</td>
                    <td>Function</td>
                    <td>-</td>
                </tr>
                </tbody>
            </table>
        </div>
    </div>
</template>

<script>
	import Demo from './demo/demo.vue';
	import Anchor from './anchor.vue';
	import iCode from './code/code';
	import Code from './code/tree';
	// import 'codemirror/mode/jsx/jsx.js'
	// import 'codemirror/theme/tomorrow-night-eighties.css'


	export default {
		name: 'templete',
		components: {
			Anchor,
			iCode,
			Demo,
		},
		mounted() {

		},
		data() {
			return {
				code: Code,
				data1: [
					{
						title: 'parent 1',
						expand: true,
						children: [
							{
								title: 'parent 1-1',
								expand: true,
								children: [
									{
										title: 'leaf 1-1-1'
									},
									{
										title: 'leaf 1-1-2'
									}
								]
							},
							{
								title: 'parent 1-2',
								expand: true,
								children: [
									{
										title: 'leaf 1-2-1'
									},
									{
										title: 'leaf 1-2-1'
									}
								]
							}
						]
					}
				],
				data2: [
					{
						title: 'parent 1',
						expand: true,
						children: [
							{
								title: 'parent 1-1',
								expand: true,
								children: [
									{
										title: 'leaf 1-1-1'
									},
									{
										title: 'leaf 1-1-2'
									}
								]
							},
							{
								title: 'parent 1-2',
								expand: true,
								children: [
									{
										title: 'leaf 1-2-1'
									},
									{
										title: 'leaf 1-2-1'
									}
								]
							}
						]
					}
				],
				data3: [
					{
						title: 'parent',
						loading: false,
						children: []
					}
				],
				data4: [
					{
						title: 'parent 1',
						expand: true,
						selected: true,
						children: [
							{
								title: 'parent 1-1',
								expand: true,
								children: [
									{
										title: 'leaf 1-1-1',
										disabled: true
									},
									{
										title: 'leaf 1-1-2'
									}
								]
							},
							{
								title: 'parent 1-2',
								expand: true,
								children: [
									{
										title: 'leaf 1-2-1',
										checked: true
									},
									{
										title: 'leaf 1-2-1'
									}
								]
							}
						]
					}
				],
				data5: [
					{
						title: 'parent 1',
						expand: true,
						render: (h, {root, node, data}) => {
							return h('span', {
								style: {
									display: 'inline-block',
									width: '100%'
								}
							}, [
								h('span', [
									h('Icon', {
										props: {
											type: 'ios-folder-outline'
										},
										style: {
											marginRight: '8px'
										}
									}),
									h('span', data.title)
								]),
								h('span', {
									style: {
										display: 'inline-block',
										float: 'right',
										marginRight: '32px'
									}
								}, [
									h('Button', {
										props: Object.assign({}, this.buttonProps, {
											icon: 'ios-plus-empty',
											type: 'primary'
										}),
										style: {
											width: '64px'
										},
										on: {
											click: () => {
												this.append(data)
											}
										}
									})
								])
							]);
						},
						children: [
							{
								title: 'child 1-1',
								expand: true,
								children: [
									{
										title: 'leaf 1-1-1',
										expand: true
									},
									{
										title: 'leaf 1-1-2',
										expand: true
									}
								]
							},
							{
								title: 'child 1-2',
								expand: true,
								children: [
									{
										title: 'leaf 1-2-1',
										expand: true
									},
									{
										title: 'leaf 1-2-1',
										expand: true
									}
								]
							}
						]
					}
				],
				buttonProps: {
					type: 'default',
					size: 'small',
				}
			}
		},
		methods: {
			loadData(item, callback) {
				setTimeout(() => {
					const data = [
						{
							title: 'children',
							loading: false,
							children: []
						},
						{
							title: 'children',
							loading: false,
							children: []
						}
					];
					callback(data);
				}, 1000);
			},
			renderContent(h, {root, node, data}) {
				return h('span', {
					style: {
						display: 'inline-block',
						width: '100%'
					}
				}, [
					h('span', [
						h('Icon', {
							props: {
								type: 'ios-paper-outline'
							},
							style: {
								marginRight: '8px'
							}
						}),
						h('span', data.title)
					]),
					h('span', {
						style: {
							display: 'inline-block',
							float: 'right',
							marginRight: '32px'
						}
					}, [
						h('Button', {
							props: Object.assign({}, this.buttonProps, {
								icon: 'ios-plus-empty'
							}),
							style: {
								marginRight: '8px'
							},
							on: {
								click: () => {
									this.append(data)
								}
							}
						}),
						h('Button', {
							props: Object.assign({}, this.buttonProps, {
								icon: 'ios-minus-empty'
							}),
							on: {
								click: () => {
									this.remove(root, node, data)
								}
							}
						})
					])
				]);
			},
			append(data) {
				const children = data.children || [];
				children.push({
					title: 'appended node',
					expand: true
				});
				this.$set(data, 'children', children);
			},
			remove(root, node, data) {
				const parentKey = root.find(el => el === node).parent;
				const parent = root.find(el => el.nodeKey === parentKey).node;
				const index = parent.children.indexOf(data);
				parent.children.splice(index, 1);
			}
		}
	}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
    h1, h2 {
        font-weight: normal;
    }

    ul {
        list-style-type: none;
        padding: 0;
    }

    li {
        display: inline-block;
        margin: 0 10px;
    }

    a {
        color: #42b983;
    }

    div {
        position: relative;
        font-size: 14px;
    }

    span.copy, span.scale, span.open-fiddle {
        border-radius: 0 0 3px 3px;
        padding: 2px 5px;
        position: absolute;
        top: 5px;
        right: 0;
        color: #b2b2b2;
        cursor: pointer;
    }

    span.scale {
        right: 25px;
    }

    span.open-fiddle {
        right: 50px;
    }

    .bg + span.copy {
        right: 5px;
    }

    span.copy:hover, span.scale:hover, span.open-fiddle:hover {
        color: #5c6b77;
    }

    .api table {
        font-family: Consolas, Menlo, Courier, monospace;
        font-size: 12px;
        border-collapse: collapse;
        border-spacing: 0;
        empty-cells: show;
        border: 1px solid #e9e9e9;
        width: 100%;
        margin-bottom: 24px
    }

    .api table th {
        background: #f7f7f7;
        white-space: nowrap;
        color: #5c6b77;
        font-weight: 600
    }

    .api table td, .api table th {
        border: 1px solid #e9e9e9;
        padding: 8px 16px;
        text-align: left
    }

    .api table td ul li {
        font-size: 12px !important
    }
</style>
